28126349 has 2 divisors, whose sum is σ = 28126350. Its totient is φ = 28126348.

The previous prime is 28126339. The next prime is 28126361. The reversal of 28126349 is 94362182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26081449 + 2044900 = 5107^2 + 1430^2 .

It is a cyclic number.

It is not a de Polignac number, because 28126349 - 2⁴ = 28126333 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28126339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14063174 + 14063175.

It is an arithmetic number, because the mean of its divisors is an integer number (14063175).

Almost surely, 2^28126349 is an apocalyptic number.

It is an amenable number.

28126349 is a deficient number, since it is larger than the sum of its proper divisors (1).

28126349 is an equidigital number, since it uses as much as digits as its factorization.

28126349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 28126349 is about 5303.4280423138. The cubic root of 28126349 is about 304.1149618583.

The spelling of 28126349 in words is "twenty-eight million, one hundred twenty-six thousand, three hundred forty-nine".